What does the Bible say about David's kingship?

In 2 Samuel 5, we see a pivotal moment where David is recognized by all the tribes of Israel as their king. After reigning over Judah for seven and a half years, David is anointed king over a united Israel, fulfilling God’s promise that he would shepherd His people. David's kingship symbolizes God's covenantal faithfulness and demonstrates the unity that can exist under God's appointed leaders. David's reign also showcases God's sovereignty as He establishes David's kingdom for the sake of His people.